Motion controlled braked operator



July 24, 1951 w, sc os 2,561,432

MOTION CONTROLLED BRAKED OPERATOR File-d May 51, 1949 m/ /xl INVENTOR.

ABRAHAM W. SCHOSTAK,

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Patented July 24, 1951 UNITED STATES PATENT OFFICE MOTION CONTROLLED BRAKED OPERATOR.

Abraham W. Schostak, Miami, Fla. Application May 31, 1949, Serial No. 96,169

This invention relates broadly to clutched hand operators. for imparting rotative motion.

. a It is an objectof the present invention to provide a hand operatcrfor transmittinglink or rotative motion, having automatic braking means for retaining the operator and associated conoperators and many other devices requiring a simplified motion controlling device having a brake.

Another object of the invention resides in the novel construction of the operator, having a fixed housingv equipped with slip type clutch teeth and an axially shiftable shaft carrying a co-acting' brake member and a hand crank for rotating the shaft andcausing slippage of the clutch in either direction, with spring means to retain the clutch elements in engaged position upon release of the hand crank. l mother important objects and advantages of the invention will be readily apparent during the course of the following description, reference being had to the accompanying drawings wherein is illustrated a preferred exemplification of the operator and wherein like characters of reference refer to like parts throughout the several views.

In the drawings:

Figure 1 is a side elevation of an operator constructed in accordance with the invention,

Figure 2 is a front elevation thereof,

Figure 3 is a rear elevation thereof,

Figure 4 is a vertical sectional view taken on line 4-4 of Figure 2,

Figure 5 is a transverse section taken on line 5-5 of Figure 4, and

Figure 6 is a transverse section taken on line 6-43 of Figure 4.

Referring specifically to the drawings, the numeral 5 designates a brake housing, formed of any desirable material, such as metal, plastic or the like. The housing 5 is equipped with oppositely extending attaching plates 6, preferably formed integral therewith and the plates 6 are provided with openings 1 for the passage of fastening devices 8, such as screws, bolts or the like.

The housing 5 is tubular, as shown and is formedopen at its rear side. The transverse forward wall 9 of the housing is provided with an extended bearing projection l0 and a centrally arranged cylindrical opening is formed therethrough, open at both ends, as indicated at. The inner portion of the wall 9 is provided with a plurality of integral V-shape brake teeth 12, radially disposed entirely therearound.

Rotatably disposed in the cylindrical opening H and projecting beyond the hearing In and beyond the housing 5, is a preferably hexagonal shaft 13. The shaft 13 supports a co-acting brake disc 14, providedwith V-shape teeth. I5, radially disposed and of a number corresponding to the teeth 12. The disc is provided with a hexagonal, centrally disposed opening It for en'- gagement over the shaft 13 and through the medium of which the disc is caused to rotate with the shaft. A cross pin l1, fitted through a drilled opening in the shaft limits the axial movement of the disc upon the shaft.

A hand crank 18, provided with a tubular head 19 at right angle thereto, engages over the forward extended end of the shaft [3 and overlies the extended bearing 10.} The opening of the tubular head is preferably tapered and open at its outer end, for the reception of a compressible brake spring 20. The spring bears against the outer end or the bearing l0 and against an inner end wall 2| of the crank head. The end wall 2| is provided with a centrally disposed axial hexagonal recess for the reception of the free end of the shaft l3. A set screw 22, passing through a preformed opening in the outer extremity of the head l9, engages in a threaded opening formed in the end of the shaft l3, thus locking the shaft and crank head together in a unitary structure to be rotated under the influence of the hand crank [8. The crank I8 is preferably cut-away, as at 23, for reduction of weight and cost of manufacture.

Any form of mechanism to be controlled by the brake crank is secured the opposite extended end of the shaft [3, such for instance as a crank 24, illustrated in dotted lines in Figures 1 and 2. Link means may be connected to the crank 24 for the control of louver closures or for imparting motion to other devices. Straight line or flexible shafts may also be connected with and controlled by the braked crank operator.

In the use of the device, the shaft l3, carrying the disc I4, is passed through the opening ll of the bearing 10 until the teeth of the disc and the teeth of the housing are engaged. Spring 20 is then slipped over the extended end of the shaft and the head l9 engaged thereover with the free end of the shaft seating in the hexagonal opening of the head. The set screw 22 is then engaged and the parts locked in rotative engagement with each other. The spring 20 having been compressed during the assembly, the tendency thereof will be to shift the shaft 13 forwardly to firmly engage the teeth 12 and I5. Rotation of the crank I8 causes the shaft to revolve and'the brake teeth l2 and I5 to slip with respect to each other, with the spring 29 presenting a constant brake engagement. The axial movement of the shaft under the influence of the brake slippage. during rotation is constantly being urged forward by the spring and theisprin'g is of sufficient strength to maintain the brake in, engaged p0 sition at any point of adjustment. I

It will be apparent from the foreg oing,- :thata very simple and eifeotive brake operator has been provided. The device is capable of actuating many forms of mechanism where motion is required invarying degrees and'will effectively hold such mechanisms in their adjusted positions. The device is easy to assemble and can be readily mounted in any desirable position, such for instance as that shown in Figure 2 in dotted lines, representing a channel member of a louver frame. The device is cheap to manufacture, is strong, durable and highly efficient in use.

I "It is to be understood, that the inventionis not limited to the precise arrangement shown, but

that it includes within its purview, whatever changes fairly come within either the terms or the spirit of the appended claims.

Having described myv invention, What I claim 1. A braked operator comprising a tubular housing open at its rear andhaving a recessed inner end wall, an attaching plate formedon the housing for rigid mounting, acentrally arranged and forwardly extending cylindrical bearing "formed on"'the hou'sing' and open at both ends, "v -shaped clutch teeth formed on the inner re- "cessed-wall of the housing and radially disposed with respect to the bearing, a hexagonal shaft extending through the housing and rotatable in the bearing, said shaft extending forwardly and.

rearwardly of the housing, a brake disc'positioned on the shaft and rotatable therewith, the disc by the spring.

open end head formed on,the crank,and extending over the exposed end of the shaft and the end of the bearing, said tubular head providing a ,housing for a compressible coiled spring positioned over the shaft, said spring engaging at one end with the bearing end and at its opposite end with the crank whereby the shaft and its brake disc is constantly urged to interlocking envgagementywith the teeth of the housing.

2,, The, structure as recited in claim 1, wherein.

the brake disc is provided with a hexagonal centrally arranged opening for engaging over the shaft anda transversely extending pin passing through the shaft for limiting the outer sliding movement of the brake disc when in braking position under'the-influe'nce of the axialmovement 3. The structure asrecited in claim 1, wherein the tubular housing, bearing and shaft are horizontally disposed with respect to the attaching plates with the shaft and disc axiallyshiftable and rotatable.

- ABRAHAM W. SCHOSTAK.

REFERENCES CITED 8 p The following references are of record injthe UNITED STATES PATENTS Number! Name 1 Date 146,776 Nichols Jan. 27, 1874 "1,044,546 Lee Nov. 19,1912 1,271,476 July-2, '191'8 1,601,824 Goldsmith Oct.'5; 1926 1,632,763 Kurscheidtet a1; June '14, 1927 1,676,441 Jackson July 10,1928 1,856,069 Dina May 3, 1932 1,982,101 Herbster Nov; 27,1934

2,284,996 Stuckenholt l June 2, 1942 

